Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9de100ffd4cd38…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 05:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf85a4d8a581305920f09839580e3e1 SHA-1: 024a3f24ba77cb5408b53af588025f8af3d2ec9f SHA-256: 8c9de100ffd4cd389c527f8e0b7bb97cdeb922b016307491dd0807f7a7ab567b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector at 'ttraff.ru', which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=professional+powerpoint+templates+free++technology', suggesting a lure related to free templates to mask malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=professional+powerpoint+templates+free++technology
    • http://tilerat.drmeladypreece.com/uploads/1/3/0/8/130874493/77666d3b7b4.pdf
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/jazzy_happy_birthday_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/earthbound_beginnings_rom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/difference_between_skyrim_and_special_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/67846866772.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/44512216324.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/catalogo_ngk_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3172/2146/files/ancient_egypt_gods_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/types_of_books_fight_list_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/ninoxafelarirafiwow.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/bajesijedepofepuvozixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/49389456258.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/captivating_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0447/2560/0410/files/sakivogebuzo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/58409148080.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006770.bin
ae7dc9bca45550a5bcaae5108717808afca090c08a6f8661c5f2e0caae4f41d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 5624 bytes
font_01_sfnt_off00007a79.bin
2a56e2df35470c9fb26375c03afbc151193995525ac8f37d09772178fdee52b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 10140 bytes

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